Down |
1. | a protein in the red blood cells that allow them to carry oxygen |
2. | constant internal environment |
3. | blood cells which fight off disease and infection |
4. | rigid tissue that supports the body |
5. | muscles that are controlled consciously |
7. | strong material that connects bone to tissue |
9. | tissue that binds the skin to the tissues inside the body and holds organs in place; most common tissue in the body |
10. | groups of organs which work together to carry out bodily functions |
11. | allowing some materials to pass through a membrane but keeping other materials out |
12. | cells that contain a central nucleus |
14. | muscle found in the walls of organs, in blood vessels and hair follicles |
17. | nerve cell |
18. | cells responsible for the transport of oxygen to body cells |
19. | the process of becoming different that cells must undergo in order to develop into tissues |
21. | skeletal muscle that appears striped under the microscope |
23. | the liquid part of blood |
27. | spaces inside the body' digestive and respiratory systems |
29. | a group of tissues that work together |